#include <iostream>
#include <cstdio>

using namespace std;

double add(double x, double y) {
    if (x >= -1000 && y <= 1000) {
        return x + y;
    }
}

int main() {
    double x, y;
    cin >> x >> y;
    printf("%.2lf", add(x, y));
    return 0;
}
